Friday, September 24, 2010

9/24/10: Friday's Weather Report

Issued at 4:25 PM CDT, Friday, September 24th, 2010

...Recap of Thursday's strong storm system that affected the Upper Midwest...

Rainfall report for Thursday, September 23rd and Friday, September 24th, 2010.  Source:  NWS Duluth, Minnesota.

Danbury WI (Burnett County)  3.61"
Butternut WI (Ashland County)  2.93"
International Falls MN (Koochiching County)  2.37"
4 miles west of Clam Lake WI (Burnett County)  2.51"
Finland MN (Lake County)  1.42"
Sarona WI (Washburn County)  2.51"
Hayward WI (Sawyer County)  1.91"
Kabetogama MN (St. Louis County)  1.70"
Northome MN (Koochiching County)  2.85"
Ashland WI (Ashland County)  2.22"
Silver Bay MN (Lake County)  1.21"
Gurney WI (Iron County)  1.98"
4 miles south of Bruno MN (Pine County)  1.10"
Cloquet MN (Carlton County)  1.20"
Maple WI (Douglas County)  1.55"
Gile WI (Iron County)  2.40"
4 miles north of Grantsburg WI (Burnett County)  4.10"
Trade Lake WI (Burnett County)  2.40"
2 miles southwest of Littlefork MN (Koochiching County)  2.92"

Brainerd MN:  0.48"
Grand Marais MN:  0.40"
Hibbing MN:  0.63"
8 miles south of Bigfork MN:  1.16"
Cook MN:  0.54"
Embarrass MN:  0.45"
Floodwood MN:  0.59"
Grand Portage MN:  1.00"
Mercer WI:  3.22"
Upson WI:  2.40"
Winter WI:  2.82"
Washburn WI:  1.91"

*Record 24 hour rainfall total at Minneapolis, Minnesota*

1.88" of rain fell at the Minneapolis/St. Paul International Airport on Thursday, September 23rd, 2010 which broke the previous 24 hour rainfall record of 1.20" which was set in 1977.

...Here are some additional flood reports from Today, Friday, September 24th, 2010 via storm spotters and emergency management...

*Faribault MN (Rice County)  Cannon River flooded over 2nd ave. northwest.  Flooding up to and into 1st ave. northwest.  Water treatment plant is flooded.
*Zumbro Falls MN (Wabasha County)  Zumbro River crested at 11:59 AM CDT Today.  2/3rd's of the town is inundated with water.  Homes have water to the bottom of first story windows.  Propane tanks floating.  Town has been evacuated.
*I-35 is closed in both directions due to water over the road between Minnesota Highway 30 (North) to Highway 14 in Owatonna, Minnesota.

Historical amounts of rain fell across Southern Minnesota between Wednesday, September 22nd and Friday, September 24th, 2010.

*Here's how the totals ranked in a 48 hour period at some select cities in Minnesota

Amboy MN:  10.68" (1st)
Winnebago MN:  7.98" (3rd)
Zumbrota MN:  7.66" (2nd)
Waseca MN:  7.65" (1st)
Blue Earth MN:  6.73" (2nd)
Faribault MN:  5.56" (2nd)
Springfield MN:  5.47" (1st)

*Here's how the totals ranked during Meteorological Fall (September 1st-November 30th)

Amboy MN:  10.68" (1st)
Winnebago MN:  7.98" (3rd)
Zumbrota MN:  7.66" (1st)
Waseca MN:  7.65" (1st)
Blue Earth MN:  6.73" (2nd)
Faribault MN:  5.56" (1st)
Springfield MN:  5.47" (1st)

Note:  The official rainfall total on Thursday at the Duluth Airport was 0.96".  Peak wind gusts during this storm were in the 40-45 mph range.

A wet and cold month across Minnesota.  Rainfall totals and average monthly temperature through September 23rd, 2010.

International Falls, MN:  4.05"/1.64" Above Normal.  49.7 degrees/4.8 degrees Below Normal.
Twin Cities, MN:  5.51"/3.35" Above Normal.  61.0 degrees/1.3 degrees Below Normal.
St. Cloud, MN:  7.11"/4.77" Above Normal.  57.2 degrees/1.5 degrees Below Normal.
Duluth, MN:  2.95"/0.35" Below Normal.  52.2 degrees/3.6 degrees Below Normal.  11 days so far this month has had at least 0.01" of precipitation at Duluth, yet were somewhat below average.

Weather History:

On this date in 2000...  A record low temperature of 26 degrees occurred at Duluth, Minnesota.

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today's Weather:

Deep low pressure (994 mb) has moved into Eastern Lake Superior late Today with high pressure (1020 mb) extending from the Northern through the Central Plains.  Mostly cloudy skies were found on the backside of this storm Today across our area, although there has been a few peeks for sunshine every now and then...Some more showers have also fallen Today across Northern-Northeast Minnesota and also over parts of Northwest Wisconsin.  Highs Today due to the clouds and cold advection (850 mb temps around +2 degrees C) were in the mid 40s to mid 50s with a few locales (Pine River and Brainerd) in the upper 50s/low 60s Today.  Winds were out of the north or west Today at 10-20 mph with gusts as high as 25-40 mph.

Today's Upper Level Analysis:

A powerful upper level low and surface low was passing through Central-Eastern Lake Superior per water vapor satellite imagery with an upper level trough covering Central Canada down through the Great Lakes/Upper Midwest.  Behind this strong storm was another disturbance which was moving southeast out of the Northern Rockies.  Strong upper level jet stream winds >110 knots were located over the Eastern Great Lakes and also in Eastern Alberta Province per RUC model analysis.


Strong Autumn storm will continue to move away from our area This Evening with high pressure pushing east from the Northern Plains while the disturbance over Southeast Montana late Today reaches the Northern Plains during the night.  Skies Tonight will vary between partly to mostly cloudy.  Showers will come to an end This Evening in Northeast and Northwest Wisconsin, then the rest of Tonight will be dry across our area.  Lows Tonight will be in the 30s and 40s.  Winds will be out of the northwest at 10-20 mph with gusts to 30-35 mph into mid-Evening.

Saturday and Saturday Night:

High pressure will be centered to our north while a low pressure disturbance continues to drop south-southeast, passing west-southwest of our immediate area.  Partly-mostly cloudy skies are on tap for Saturday with a few showers possible, mainly in Western-Southern areas.  Dry weather is expected Tomorrow Night.  Highs Tomorrow will be in the 50s to around 60 degrees with lows Tomorrow Night mainly in the 30s, but some 20s are possible in the typical cold spots.  Variable to east winds will occur during this period under 15 mph.

Extended Forecast:

A pattern much more typical of September will finally develop for the Upper Midwest for next week and possibly into early October.  We will see the occasional cold front move through the region as low pressure systems pass by to our north, but these systems should be starved for moisture, so only a wind shift and transitions from warm to cold advection will occur and probably some clouds at times, but little if any rain is expected from Sunday (9/26) through all of next week Sunday (10/3).  High temperatures will be in the 50s and 60s Sunday and Monday, but a few spots could push toward 70 degrees both days.  Low temperatures will be in the 30s and 40s Sunday Night and mainly 40s for Monday Night.

5 Day Forecast for Duluth/Superior

.Tonight...  Breezy early.  Considerable cloudiness with patchy light rain showers early.  Some partial clearing late.  Low 37 to 42.  Wind northwest at 15 to 25 mph with gusts to 35 mph, wind decreasing to 10 to 20 mph during the Evening.

.Saturday...  Variable cloudiness.  High 53 to 58.  Wind variable at 5 to 15 mph.

.Saturday Night...  Partly cloudy.  Low 33 to 38.  Wind east to southeast at 5 to 15 mph.

.Sunday...  Mostly sunny.  High 57 to 62.

.Sunday Night...  Mostly clear.  Low 40 to 45.

.Monday...  Partly sunny.  High 60 to 65.

.Monday Night...  Partly cloudy.  Low 40 to 45.

.Tuesday...  Partly cloudy.  High 60 to 65.

Normal High Temperature Today 62 degrees
Normal Low Temperature Today 42 degrees